<End> key / lineEnd command bug with RTL

[esm7]

When in visual RTL mode, if the last word in a line is an English one, the End key (and the lineEnd command) jump to the wrong place.

Way to recreate, in an RTL CodeMirror instance, e.g. https://codemirror.net/demo/bidi.html:

1. Write a text in an RTL language (e.g. Hebrew) that ends with an LTR language (e.g. English). I used "ניסיון ABC". Unlike here in this text, the ABC should appear to the left of the Hebrew word.
2. In that line, press the <End> key. The cursor is actually before the English word instead of after it.
3. If at this point you press <Enter>, the English word will move to the next line. The expected behavior is of course that <End> followed by <Enter> will start a new empty line.

[marijnh]

The bidi handling in CodeMirror 5.x is a bit of a tangled (and, in parts, misguided) mess. I just checked the upcoming version 6, which seems to handle this properly.

It is unlikely that I'll patch this in 5.x, but if you want to try your hand at a pull request, that'd be welcome. Upgrading to the new code is not really recommended yet unless you're willing to deal with beta-quality, somewhat-unstable software, but will be the recommended way to deal with this on the long term.

[esm7]

I tried to spend some time going over the relevant code but like you say, it's somewhat tangled.
We'll wait for version 6 in this case.